3.2.4.4.1.15 IVolumeClient::FTRegenerateParityStripe (Opnum 18)

  • Article

The FTRegenerateParityStripe method restores the redundancy of an FT RAID-5 set on basic disks by regenerating the parity of the volume. This is a synchronous task.<63>

 HRESULT FTRegenerateParityStripe(
   [in] LdmObjectId volumeId,
   [in] hyper volumeLastKnownState,
   [out] TASK_INFO* tinfo
 );

volumeId: Specifies the OID of the FT RAID-5 set for which the parity is being regenerated.

volumeLastKnownState: Last known modification sequence number of the FT RAID-5 set.

tinfo: Pointer to a TASK_INFO structure that the client can use to track the request's progress.

Return Values: The method MUST return 0 or a nonerror HRESULT on success, or an implementation-specific nonzero error code on failure (as specified in [MS-ERREF]; see also section 2.2.1 for HRESULT values predefined by the Disk Management Remote Protocol).

Upon receiving this message, the server MUST validate parameters:

  1. Verify that the FT volume specified by volumeId is in the list of storage objects, and check whether volumeLastKnownState matches the LastKnownState field of the object. Verify that the FT volume is an FT RAID-5 set.

  2. Verify that tinfo is not NULL.

If parameter validation fails, the server MUST fail the operation immediately, returning an appropriate error as its response to the client.

Otherwise, the server MUST process the message as follows:

  1. Start the parity regeneration for the FT volume specified by volumeId.

  2. Wait for the parity regeneration start to either succeed or fail.

  3. Fill in the tinfo output parameter.

    TASK_INFO member

    Required for this operation

    TASK_INFO::id

    Required.

    TASK_INFO::storageId

    Not required.

    TASK_INFO::createTime

    Not required.<64>

    TASK_INFO::clientID

    Not required.<65>

    TASK_INFO::percentComplete

    Required for any task that returns REQ_IN_PROGRESS.

    TASK_INFO::status

    Required.

    TASK_INFO::type

    Required if PercentageComplete is being used.

    TASK_INFO::error

    Required.

    TASK_INFO::tflag

    Not required.<66>

  4. Return a response to the client that contains tinfo and the status of the operation.